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2024年小麥春季重大病蟲害防控技術方案

2024-03-11 11:54:55 來源:全國農業技術推廣服務中心 閱讀量:19947 評論

  【農機網 熱點關注】 據全國農技中心預測分析,2024年春季小麥赤霉病、條銹病、白粉病、紋枯病、莖基腐病、蚜蟲、葉螨、吸漿蟲等病蟲害總體偏重發生,尤其是開春以來,我國黃淮東南部、江淮、江漢、江南等地遭遇兩次低溫雨雪冰凍天氣,麥田濕度大,隨著氣溫回升,紋枯病、莖基腐病等土傳病害發生有加快擴展蔓延的趨勢。為有效控制病蟲危害、助力小麥大面積單產提升,確保小麥豐產豐收,制定本方案。
 
  一、防控目標
 
  全國實現病蟲害防治處置率 95% 以上,綠色防控覆蓋率 58% 以上,綜合防治效果 85% 以上,危害損失率控制在 5% 以內;優質小麥生產基地、綠色防控示范基地、省部級綠色高產高效示范片實現統防統治全覆蓋。
 
  二、防控策略
 
  堅持因地制宜、分區施策、分類指導的原則,抓住重大病蟲、重點區域、關鍵時期,開展綜合防治和統防統治,強化綠色防控、科學用藥、農藥減量,提高防控效果,實現小麥病蟲防控目標,保障小麥生產安全和質量安全。
 
  三、重點防控對象
 
  重點防控小麥赤霉病、條銹病、蚜蟲等一類病蟲害,以及莖基腐病、紋枯病等莖基部病害,兼顧白粉病、葉銹病、吸漿蟲等常發病蟲。
 
  (一)華北麥區。以紋枯病、莖基腐病、白粉病和蚜蟲防治為主,兼顧銹病、赤霉病、葉螨和吸漿蟲等。
 
  (二)黃淮麥區。以條銹病、莖基腐病、赤霉病、紋枯病、蚜蟲等病蟲為重點,兼顧白粉病、葉銹病、根腐病、葉螨防控;黃淮南部應加強赤霉病預防。
 
  (三)長江中下游麥區。以赤霉病、紋枯病、蚜蟲為主,兼顧白粉病、條銹病等病蟲。
 
  (四)西北麥區。以條銹病、莖基腐病、蚜蟲為主,兼顧赤霉病、白粉病、葉螨、吸漿蟲等病蟲;新疆麥區需關注雪霉葉枯病。
 
  (五)西南麥區。以條銹病、赤霉病、葉螨為主,兼顧白粉病、蚜蟲等。
 
  四、防控措施
 
  (一)返青拔節期
 
  以防治條銹病、紋枯病、莖基腐病為重點,挑治蚜蟲和葉螨。對條銹病,要加強病情監測,實施分區防控。西南、漢水流域和陜西關中、河南南部、甘肅隴南等主要冬繁區,要全面落實“帶藥偵查、打點保面”防治策略,及時封鎖發病田塊,減少菌源外傳,降低和延緩向黃淮、長江中下游和華北麥區擴散蔓延。在越夏區,春季要加強轉主寄主小檗周邊自生麥苗及麥秸管理,控制條銹菌有性生殖,降低病菌毒性變異速率。黃淮春季流行區,堅持“發現一點,防治一片”,及時控制發病中心;當田間平均病葉率達到 0.5%—1% 時,組織開展大面積應急防控,做到同類區域防治全覆蓋。防治藥劑可選用戊唑醇、氟環唑、丙環唑、嘧啶核苷類抗菌素、丙硫菌唑·戊唑醇等。對紋枯病,于小麥拔節初期,田間病株率達 10% 時主動施藥防治,防治藥劑可選用井岡·蠟芽菌、噻呋酰胺、戊唑醇、丙環唑、烯唑醇、井岡霉素、多抗霉素等。對莖基腐病,于小麥返青拔節期,選用丙硫菌唑、丙硫唑、葉菌唑、氰烯菌酯、戊唑醇、苯醚甲環唑、氯氟嘧菌唑等藥劑防治。對紋枯病、莖基腐病等莖基部病害的防治,要注意加大水量,將藥液噴淋在麥株莖基部,以確保防治效果。
 
  對葉螨,當平均 33厘米行長螨量達 200 頭時,選用阿維菌素、聯苯菊酯、聯苯·三唑磷等藥劑噴霧防治,同時可通過中耕除草、合理肥水等農業措施,降低田間蟲量。對蚜蟲,當蚜量達到百株 200 頭時,應選用啶蟲脒、噻蟲胺、高效氯氰菊酯、抗蚜威等藥劑及時開展防治。
 
  如果多種病蟲同時發生,可分別選擇對路農藥混配防治,提高防治效率;在病蟲防控的同時,可結合當地苗情,添加生長調節或免疫誘抗劑如蕓苔素內酯、赤·吲乙·蕓苔、氨基寡糖素、二氫卟吩鐵、噻苯隆、免疫激活蛋白等,提高抗病蟲和抵御倒春寒等能力,提高病蟲防控效果。
 
  (二)抽穗揚花期
 
  以預防赤霉病為主,兼顧銹病、白粉病、吸漿蟲等。對赤霉病,長江中下游和黃淮南部等常年病害流行區,應抓住齊穗至揚花初期關鍵時期,主動預防,遏制病害流行,藥劑品種可選用氰烯菌酯、丙硫菌唑、氟唑菌酰羥胺、戊唑醇、丙唑·戊唑醇、葉菌唑、氰烯·戊唑醇、枯草芽孢桿菌、井岡·蠟芽菌等,要用足藥液量,施藥后遇雨,應及時補治;如抽穗揚花期遇連續陰雨天氣,需隔 5—7 天再輪換用藥防治 1—2 次,確保防治效果。苯丙咪唑類藥劑抗性水平高的地區,應停止使用多菌靈、甲基硫菌靈等藥劑,提倡輪換用藥和組合用藥。對華北、西北赤霉病偶發區,應關注抽穗揚花期天氣預報,因地制宜實施主動預防。
 
  對小麥吸漿蟲,應重點做好抽穗期的成蟲防治。在抽穗初期10復網20頭以上成蟲時,及時選用阿維·吡蟲啉、高效氯氟氰菊酯、氯氟·吡蟲啉等農藥進行防治,重發區間隔 3 天輪換用藥,再防治 1 次。
 
  對小麥白粉病、葉銹病,可以結合防治條銹病、赤霉病進行兼治;當田間病葉率達 10% 時,選用環丙唑醇、腈菌唑、丙環唑、氟環唑等殺菌劑進行防治,嚴重發生田塊,應間隔 7—10 天再輪換用藥防治 1 次。
 
  (三)灌漿期
 
  重點防控麥穗蚜、白粉病和葉銹病,提倡綜合用藥,達到一噴多效。當田間百穗蚜量達 800 頭以上,益害比(天敵:蚜蟲)低于 1:150 時,可選用啶蟲脒、吡蚜酮、抗蚜威、高效氯氟氰菊酯、苦參堿、耳霉菌等藥劑噴霧防治。有條件的地區,提倡釋放蚜繭蜂等天敵昆蟲進行生物防治。對小麥白粉病、葉銹病,當田間病葉率達 10% 時,選用環丙唑醇、腈菌唑、丙環唑、氟環唑等殺菌劑進行防治,嚴重發生田,應隔 7—10 天再噴 1 次。可結合小麥“一噴三防”,實施殺蟲劑、殺菌劑、植物生長調節劑科學混用,綜合控制病蟲,助力單產提升行動。
 
  五、主推技術
 
  (一)綠色防控技術
 
  重點推廣生態調控、保護及利用天敵、免疫誘抗、生物農藥等技術。對于條銹病、赤霉病、蚜蟲等重大病蟲,要加強監測預警,及早發現、及時處置;對重點區域,應加強病情普查,必要時組織開展專業化應急防控,防止病蟲大面積暴發危害。
 
  (二)穗期“一噴三防”技術
 
  小麥抽穗至灌漿期是赤霉病、條銹病、白粉病、葉銹病、蚜蟲、吸漿蟲等多種病蟲同時發生危害的關鍵期,可選用高效對路的殺菌劑、殺蟲劑、葉面肥、免疫激活蛋白、調節劑和農藥助劑等科學混用,綜合施藥,提高作物的免疫力,防病蟲防早衰防干熱風,達到一噴多效、農藥減量和單產提升的效果。
 
  (三)科學用藥技術
 
  在病蟲發生關鍵時期,選用對路藥劑、用足藥量水量、科學混配、交替用藥,注意保護蜜蜂等非靶標生物;推廣自走式噴桿噴霧機、植保無人飛機等高效施藥機械,使用植保無人飛機施藥時,應添加相應的沉降、抗蒸發等功能的助劑,每畝用水量不低于 1.5 升,確保防治效果。
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